Abstract [en]

AbstractThe Master Thesis was preformed at Ericsson in Kista at the division Interconnect which designs the internal cabling for all Radio Base Stations (RBS). Due to the complex usage of telecommunication today, many different RBS cabinets are developed and they vary in capacity and design. The cabling is designed late in the development process which results in unnecessary loss of usability. The goal is therefore to develop a solution that can be applied in all the RBS cabinets so that the cabling becomes consistent and more effective.There are several smaller solutions at the market of cabling today but not an entire system. The most common RBS cabinets are studied carefully and the knowledge of these is essential to develop the most suitable system and to identify the necessary requirements and functions. The strapping points in the RBS cabinets currently not placed at the most suitable locations. Cable shelves and guides are placed everywhere there are some extra space and a lot of these are never used. This contributes to that the cabling has to be adapted to the strapping points and not the other way around.To solve this, a concept is created to fulfill the requirements specification and then developed into a cabling system. The system is based on two guides, one straight and one curved, that are placed where the cables need extra support and guidance, such as junctions and corners. Rails are running on the sides and with these the guides can be attached together in different ways to fulfill the specific requirements of every possible location. By combining the guides, the system also can separate different types of cables, such as power and signal cables. In the same way, guides can be added to enhance the cabling capacity to fit the number of cables.The guides are manufactured in Polypropylene (PP) and with the manufacturing process Injection Molding. The design is therefore adapted for the chosen process and material. The two enclosing covers, which secure the cables inside the guides, are designed with a so called ‘Living hinge’. It can therefore be made in one piece and with only one mold.The cabling system requires a new way of thinking and a development process which includes the cabling in an earlier stage. I believe that the system has a potential to create a structured cabling and a generally accepted appearance inside every Radio Base Station developed by Ericsson.